
def change_up(password:str,n:int) -> int:
    return None


# 真有实力，减成负数也能找到这个元素！！！！！！！！！！！！
def decodeWangzai(password: str, n: int) -> str:
        n %= 26

        res = "abcdefghijklmnopqrstuvwxyz"
        result = ''
        for i in password:
            address = res.index(i) - n
            result += res[address]
        
        return result

if __name__ == "__main__":
    b = "abcd"

    print(change_up(b,1))
